d Other nonrelative care includes family day care providers, in-home babysitters, and other nonrelatives providing care in either the child’s or provider’s home.

e Other for 1985–1993 includes children in kindergarten or grade school, in a school-based activity, or in self-care. In 1995, it also includes children with no regular arrangement. Beginning in 1997, Other includes children in kindergarten or grade school, self-care, and with no regular arrangement, but does not include school-based activities, as they were deleted as categorical choices for preschoolers.

f From 1995 to 2002, following the 1977 Office of Management and Budget (OMB) standards for collecting and presenting data on race, the Survey of Income and Program Participation (SIPP) asked respondents to choose one race from the following: White, Black, American Indian or Alaskan Native, or Asian or Pacific Islander. The Census Bureau also offered an “Other” category. Beginning in 2004, following the 1997 OMB standards for collecting and presenting data on race, SIPP asked respondents to choose one or more races from the following: White, Black or African American, Asian, American Indian or Alaska Native, or Native Hawaiian or Other Pacific Islander. The Census Bureau also offered an “Other” category. All race groups discussed in this table from 2004 onward refer to people who indicated only one racial identity within the racial categories presented. People who responded to the question on race by indicating only one race are referred to as the race-alone population. The use of the race-alone population in this table does not imply that it is the preferred method of presenting or analyzing data. Data from 2004 onward are not directly comparable with data from earlier years. Data on race and Hispanic origin are collected separately. Persons of Hispanic origin may be of any race.

NOTE: Employed mothers are those with wage and salary employment or other employment arrangements, including contingent work and self-employment. Data for years 1995 to 2011 were proportionately redistributed to account for tied responses for the primary arrangement so that they total to 100 percent and are comparable to earlier years.